Which version of Gemini web are you running?
Can you please check the error log (%appdata%\countersof\Gemini\VisualStudio2008\app.log)?

3.7.1 Build 2732

Can you please check the error log (%appdata%\countersof\Gemini\VisualStudio2008\app.log)?

I have the same error in the Outlook addin log

[2010-07-05 14:17:34,260] [ERROR] - LogMeIn
Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Line 1, position 1.
   at Newtonsoft.Json.JsonTextReader.ParseValue(Char currentChar)
   at Newtonsoft.Json.JsonTextReader.Read()
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
   at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value)
   at CounterSoft.Gemini.WebServices.BaseService.GetObjectFromResponse[T](Stream stream)
   at CounterSoft.Gemini.WebServices.BaseService.ProcessResponse[T](String url, Object obj, RequestType requestType)
   at CounterSoft.Gemini.WebServices.BaseService.WhoAmI()
   at CounterSoft.Gemini.Client.Commons.Model.GeminiModel.LogMeIn(Connection connection)

It seems like the URL you are typing is wrong or inaccessible. Did you enter the URL in the form of http://server/gemini ?

Are you using windows authentication? If so, have you disabled anonymous access in IIS directory security for the Gemini site?

No, the URL is http://issues.domain.com  with the host header set to to respond accordingly, and I'm using Forms Authentication.

The web site seems to function correctly, it's just the integration that's broken.

Are you able to use a tool like Fiddler (http://www.fiddler2.com/fiddler2/) to check the response from the server?
If not let us know and we remote in to your box to see if we can solve the issue (support at countersoft dot com).

Ok, found it - my bad.

New VPS server and I assumed that it had 3.5 SP1 - and didn't!

Once I installed 3.5 SP1 it all worked.

Great news, thanks for the update.